论文标题
在儿童活动水平的大量变化中，伤害风险最小
Injury risk increases minimally over a large range of changes in activity level in children
论文作者
论文摘要
背景：关于身体活动水平的变化与儿童伤害之间的关联的研究有限。目的：评估急性的不同变化：慢性工作量比（ACWR），一种衡量活动变化的量度，可以预测儿童的伤害。方法：我们使用1670名丹麦学童的数据进行了一项前瞻性队列研究，该数据的量度超过5。5年（2008年至2014年）。在过去一周中，使用活动频率作为急性负载（分子）和过去4或5周的平均每周活动频率在过去的4或5周中使用活动频率计算为4周的4周耦合4周和未耦合的5周ACWRS，作为慢性负载（分母）。我们使用广义线性和广义添加剂模型对不同的ACWR变化与伤害之间的关系进行了建模，并在有或不考虑重复度量的情况下。结果：使用通用的5周ACWR的通用加法模型，最好代表ACWR与伤害风险之间的预后关系。它预测ACWRS的伤害风险约为3％（活动水平降低20％）和1.5（活动水平增加了50％）。当活动降低超过20％（ACWR <0.8）时，损伤风险较低（ACWR = 0时至少1.5％）。当活动增加超过50％（ACWR> 1.5）时，伤害风险更高（ACWR = 5时最多6％）。女孩的受伤风险明显高于男孩。结论：与成年人先前的结果相比，儿童体育活动的增加与损伤风险要低得多。
Background: Limited research exists on the association between changes in physical activity levels and injury in children. Objective: To assess how well different variations of the acute:chronic workload ratio (ACWR), a measure of change in activity, predict injury in children. Methods: We conducted a prospective cohort study using data from 1670 Danish schoolchildren measured over 5.5 years (2008 to 2014). Coupled 4-week, uncoupled 4-week, and uncoupled 5-week ACWRs were calculated using activity frequency in the past week as the acute load (numerator), and average weekly activity frequency in the past 4 or 5 weeks as the chronic load (denominator). We modelled the relationship between different ACWR variations and injury using generalized linear and generalized additive models, with and without accounting for repeated measures. Results: The prognostic relationship between the ACWR and injury risk was best represented using a generalized additive mixed model for the uncoupled 5-week ACWR. It predicted an injury risk of ~3% for ACWRs between 0.8 (activity level decreased by 20%) and 1.5 (activity level increased by 50%). When activity decreased by more than 20% (ACWR< 0.8), injury risk was lower (minimum of 1.5% at ACWR=0). When activity increased by more than 50% (ACWR > 1.5), injury risk was higher (maximum of 6% at ACWR = 5). Girls were at significantly higher risk of injury than boys. Conclusion: Increases in physical activity in children are associated with much lower injury risks compared to previous results in adults.
